240mm2 power cable

240mm2 power cable

(Including common cable, flame retardant cable, fire resistance cable and low smoke, halogen free, flame retardant cable)

Application

(1)Rated voltage Uo/U is 0.6/1 kilovolts.

(2)Maximum rated temperature of cable conductor is 90°C.

(3)Maximum conductor temperature is lower than 250°C when cable is shorted for less than 5 seconds.

(4)Ambient temperature is not lower than 0°C and its minimum bending radius is as follows when cable is installed.

Key Technical Parameter

Calculation condition of ampacity

-ambient temperature is 25°C (underground),40°C(air).

-conductor working temperature is 90°C

-soil heat resistance coefficient is 1.0°C·m/W, but not consider its rise resulted from water migration when it operates continuously.

-gap between axis of cable and surface of around is 700millimeter when it is laid in earth.

-for many cable being laid in parallel. gap of axis of cables is 2 times O.D.

   20170208